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ischemia/phosphatase
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Phosphatase and tensin homolog-β-catenin signaling modulates regulatory T cells and inflammatory responses in mouse liver ischemia/reperfusion injury.
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The phosphatase and tensin homolog (PTEN) deleted on chromosome 10 plays an important role in regulating T cell activation during inflammatory response. Activation of β-catenin is crucial for maintaining immune homeostasis. This study investigates the functional roles and molecular mechanisms by
Atrogin-1/MAFbx enhances simulated ischemia/reperfusion-induced apoptosis in cardiomyocytes through degradation of MAPK phosphatase-1 and sustained JNK activation.
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Atrogin-1/MAFbx is a major atrophy-related E3 ubiquitin ligase that is expressed specifically in striated muscle. Although the contribution of atrogin-1 to cardiac and muscle hypertrophy/atrophy has been examined extensively, it remains unclear whether atrogin-1 plays an essential role in the
Neuroprotective effects of protein tyrosine phosphatase 1B inhibitor on cerebral ischemia/reperfusion in mice.
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Akt (Protein kinase B, PKB), a serine/threonine kinase, plays a critical role in cell development, growth, and survival. Akt phosphorylation mediates a neuroprotective effect against ischemic injury. Recently, a protein-tyrosine phosphatase-1B (PTP1B) inhibitor (KY-226) was developed to elicit
A protein tyrosine phosphatase inhibitor accelerates angiogenesis in a rat model of hindlimb ischemia.
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Vascular endothelial growth factor (VEGF) receptor-2 (KDR/flk-1) has a tyrosine kinase domain and, once activated, induces the autophosphorylation of the tyrosine residues. The phosphorylated KDR/flk-1 can be a substrate for intracellular protein tyrosine phosphatases (PTPs). In the present study,
Phosphatase Wip1 as a new therapeutic target for intestinal ischemia-reperfusion injury.
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Intestinal ischemia/reperfusion (I/R) injury is a pathophysiology involving local tissue injury and organ dysfunction. Accumulating evidence has confirmed that the infiltration of neutrophils is of central importance in mediating intestinal I/R injury. On the other hand, adequate neutrophils in the
Intracerebroventricular injection of human prostatic acid phosphatase has potent neuroprotective effects against transient focal cerebral ischemia in rats.
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Though the potential use of adenosine as a neuroprotective agent has long been realized, there are currently no adenosine-based therapies for the prevention or treatment of cerebral ischemia and reperfusion injury. Prostatic acid phosphatase (PAP), an enzyme that has long served as a diagnostic
Curcumin treatment recovery the decrease of protein phosphatase 2A subunit B induced by focal cerebral ischemia in Sprague-Dawley rats.
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Curcumin provides various biological effects through its anti-inflammatory and antioxidant properties. Moreover, curcumin exerts a neuroprotective effect against ischemic condition-induced brain damage. Protein phosphatase 2A (PP2A) is a ubiquitous serine and threonine phosphatase with various cell
Src kinase up-regulates the ERK cascade through inactivation of protein phosphatase 2A following cerebral ischemia.
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BACKGROUND
The regulation of protein phosphorylation requires a balance in the activity of protein kinases and protein phosphatases. Our previous data indicates that Src can increase ERK activity through Raf kinase in response to ischemic stimuli. This study examined the molecular mechanisms by
Prevention of JNK phosphorylation as a mechanism for rosiglitazone in neuroprotection after transient cerebral ischemia: activation of dual specificity phosphatase.
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Rosiglitazone, a synthetic peroxisome proliferator-activated receptor-γ (PPARγ) agonist, prevents cell death after cerebral ischemia in animal models, but the underlying mechanism has not been clarified. In this study, we examined how rosiglitazone protects neurons against ischemia. Mice treated
Ischemia-induced inhibition of the initiation factor 2alpha phosphatase activity in the rat brain.
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Rats were subjected to the standard four-vessel occlusion model of brain transient ischemia for 30 min. Following different recirculation periods, the level of phosphorylation of the initiation factor 2 subunit alpha (eIF2alpha) and the eIF2alpha kinase/s and phosphatase/s activity were determined.
Effect of ischemia-reperfusion on the heterogeneous lobular distribution pattern of glycogen content and glucose-6-phosphatase activity in human liver allograft.
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In order to examine glucose metabolism in liver grafts after cold ischemia and reperfusion, the heterogeneous lobular distribution pattern of glycogen content and glucose-6-phosphatase activity was studied using histochemical methods. The characteristic heterogeneous lobular distribution pattern of
Studies on the alkaline phosphatase rise following colon ischemia.
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The elevation of serum alkaline phosphatase (ALP) that develops in the dog after 24 hours of colon ischemia was studied to determine its tissue origin. Portal, hepatic, and aortic blood were sampled but no difference in ALP level among these sites was found. In sera shown to have a significant rise
Effects of focal cerebral ischemia on inositol 1,4,5-trisphosphate 3-kinase and 5-phosphatase activities in rat cortex.
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Ins(1,4,5)P3 3-kinase and 5-phosphatase are important enzymes responsible for the metabolism of Ins(1,4,5)P3, a second messenger for mobilization of intracellular Ca2+ stores. Focal cerebral ischemia induced in Long Evans rats through occlusion of the right middle cerebral artery (MCA) and both
Protein phosphatase inhibitors calyculin A and fostriecin protect rabbit cardiomyocytes in late ischemia.
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Calcium-tolerant rabbit cardiomyocytes were isolated using retrograde aortic perfusion with a nominally calcium-free, collagenase buffer. In vitro ischemic preconditioning was induced by a 10-min episode of ischemic pelleting, followed by a 15-min post-incubation and a prolonged period of ischemic
Ischemia-induced phosphorylation of initiation factor 2 in differentiated PC12 cells: role for initiation factor 2 phosphatase.
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An in vitro model of ischemia was obtained by subjecting PC12 cells differentiated with nerve growth factor to a combination of glucose deprivation plus anoxia. Immediately after the ischemic period, the protein synthesis rate was significantly inhibited (80%) and western blots of cell extracts
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